b6c1d5b81e
We never allocate the ceph_buffer and buffer separtely, so use a single constructor. Disallow put on NULL buffer; make the caller check. Signed-off-by: Sage Weil <sage@newdream.net>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
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#include "ceph_debug.h"
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#include "buffer.h"
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struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
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{
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struct ceph_buffer *b;
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b = kmalloc(sizeof(*b), gfp);
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if (!b)
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return NULL;
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b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
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if (b->vec.iov_base) {
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b->is_vmalloc = false;
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} else {
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b->vec.iov_base = __vmalloc(len, gfp, PAGE_KERNEL);
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if (!b->vec.iov_base) {
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kfree(b);
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return NULL;
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}
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b->is_vmalloc = true;
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}
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kref_init(&b->kref);
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b->alloc_len = len;
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b->vec.iov_len = len;
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dout("buffer_new %p\n", b);
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return b;
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}
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void ceph_buffer_release(struct kref *kref)
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{
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struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
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dout("buffer_release %p\n", b);
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if (b->vec.iov_base) {
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if (b->is_vmalloc)
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vfree(b->vec.iov_base);
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else
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kfree(b->vec.iov_base);
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}
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kfree(b);
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}
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int ceph_buffer_alloc(struct ceph_buffer *b, int len, gfp_t gfp)
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{
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b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
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if (b->vec.iov_base) {
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b->is_vmalloc = false;
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} else {
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b->vec.iov_base = __vmalloc(len, gfp, PAGE_KERNEL);
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b->is_vmalloc = true;
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}
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if (!b->vec.iov_base)
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return -ENOMEM;
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b->alloc_len = len;
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b->vec.iov_len = len;
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return 0;
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}
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